| title | creator | language | description | tableOfContents | contributor | subject | created |
| A New Subspecies of Pocket Mouse from Kansas | Hall, E. Raymond (Eugene Raymond), 1902-1986 | en | | | | | 2010-01-19 |
| Criticism on "The origin of species" | Huxley, Thomas Henry, 1825-1895 | en | | | | Darwin, Charles, 1809-1882; Evolution | 2001-11-01 |
| The Field and Garden Vegetables of America
Containing Full Descriptions of Nearly Eleven Hundred
Species and Varietes; With Directions for Propagation,
Culture and Use. | Burr, Fearing | en | | | | Vegetable gardening -- United States; Vegetables -- Varieties | 2007-06-05 |
| On the Origin of Species by Means of Natural Selection
or the Preservation of Favoured Races in the Struggle for Life. (2nd edition) | Darwin, Charles, 1809-1882 | en | | | | Evolution (Biology); Natural selection | 2007-09-25 |
| An Essay on the Slavery and Commerce of the Human Species, Particularly the African
Translated from a Latin Dissertation, Which Was Honoured with the First Prize in the University of Cambridge, for the Year 1785, with Additions | Clarkson, Thomas, 1760-1846 | en | | | | | 2004-01-01 |
| A New Subspecies of Bat (Myotis velifer) from Southeastern California and Arizona | Vaughan, Terry A. | en | | | | | 2010-02-08 |
| A New Subspecies of Microtus montanus from Montana and Comments on Microtus canicaudus Miller | | en | | | | Microtus; Mammals -- Montana | 2009-05-18 |
| On the Reception of the 'Origin of Species' | Huxley, Thomas Henry, 1825-1895 | en | From Life and Letters of Charles Darwin | | | Evolution; Darwin, Charles, 1809-1882. On the origin of species | 2000-02-01 |
| Origin of Species | Huxley, Thomas Henry, 1825-1895 | en | | | | Darwin, Charles, 1809-1882; Evolution | 2001-11-01 |
| A New Supspecies of Slider Turtle (Pseudemys scripta) from Coahuila, Mexico | Legler, John M. | en | | | | | 2010-03-09 |
| On the Genesis of Species | Mivart, St. George | en | | | | | 2007-03-14 |
| A New Species of Frog (Genus Tomodactylus) from Western Mexico | Webb, Robert G. | en | | | | | 2010-02-03 |
| A New Subspecies of Lizard, Cnemidophorus sacki, from Michoacan, Mexico | Duellman, William E., 1930- | en | | | | | 2010-08-23 |
| On the Origin of Species: or, the Causes of the Phenomena of Organic Nature | Huxley, Thomas Henry, 1825-1895 | en | | | | Darwin, Charles, 1809-1882; Evolution | 2001-11-01 |
| A New Subspecies of the Black Myotis (Bat) from Eastern Mexico | | en | | | | | 2008-10-24 |
| Descriptions of Two Species of Frogs, Genus Ptychohyla
Studies of American Hylid Frogs, V | Duellman, William E., 1930- | en | | | | | 2010-02-21 |
| Natural History of the Brush Mouse (Peromyscus boylii) in Kansas With Description of a New Subspecies | Long, Charles A. | en | | | | | 2010-02-09 |
| The Unprotected Species | Sturgis, Melvin | en | | | | | 2010-04-18 |
| The North American Slime-Moulds
A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species | MacBride, Thomas H. (Thomas Huston) | en | | | | | 2010-01-27 |
| A New Species of Pocket Gopher (Genus Pappogeomys) From Jalisco, Mexico | Russell, Robert J. | en | | | | | 2010-01-20 |
| The Subspecies of the Mexican Red-bellied Squirrel, Sciurus aureogaster | Kelson, Keith R. | en | | | | | 2010-01-26 |
| Delineations of the Ox Tribe
The Natural History of Bulls, Bisons, and Buffaloes.
Exhibiting all the Known Species and the More Remarkable
Varieties of the Genus Bos. | Vasey, George, 1822-1893 | en | | | | Cattle; Buffaloes; American bison; Oxen | 2009-02-03 |
| A New Subspecies of Wood Rat (Neotoma mexicana) from Colorado | Finley, Robert B. | en | | | | | 2010-02-01 |
| A Monograph on the Sub-class Cirripedia
With Figures of all the Species. | Darwin, Charles, 1809-1882 | en | | | | | 2010-03-08 |
| On the origin of species | Darwin, Charles, 1809-1882 | en | See also PG#2009 for the 6th Edition | | | Evolution (Biology); Natural selection | 1998-03-01 |